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Synthesis of metal-containing nanoparticles fixed on the SiO2 matrix

Andrey Volkov 1Ksenia Кatok 2Yuliya Bolbukh 2Oleg V. Popkov 1Gleb Yurkov 1

1. Kurnakov Institute of General and Inorganic Chemistry RAS (IGIC), Leninsky prospect, 31, Moscow 119991, Russian Federation
2. Institute of Surface Chemistry, Generala Naumova 17, Kiev 03164, Ukraine

Abstract

In this study, we suggest an original method for synthesizing Fe3O4 and Fe2O3 nanoparticles localized on the surface silica nanoparticles. Iron oxide nanoparticles were prepared via precipitation from inverse suspensions containing silica modified with amino groups in the argon atmosphere under vigorous stirring at 40°C with further heating to 60°C. The modification of the silica was realized via interaction of surface silanol groups with γ-aminopropyltriethoxy silane at a mild condition in the toluene media. The size distribution and composition of the Fe-containing nanoparticles in the samples produced were investigated by means of TEM and XRD. Synthesis of silver nanoparticles was carried out in result of interaction between silver nitrate solution and silica modified with functional groups that possess reducing properties. After reduction procedure silica with attached to surface silver particles or in mixture were dried at 20 or 120 °C. Obtained composites were studied by UV-Vis spectra. On Figure the UV-spectra of ferric oxide (1-3) and silver (4) particles synthesized in the presence of modified silica are represent. Curve 5 corresponds to modified silica without metal. Presence of surface plasmon band in visible region at 400 nm provided evidence for silver nanoparticles formation.

This work was partial finance supported by the Russian Foundation for Basic Research (grant nos. 06-03-72031-MSTI, 07-03-00885, 07-08-00523, 08-03-00681, 08-08-90250), INTAS-05-1000008-7834, the grant of the President of the Russian Federation MK- 253.2007.3, Russian Science Support Foundation, ISTC nos. 3457, the Russian Academy of Sciences of the research programs «Development of methods for synthesis of chemical substances and creation of new materials» and «Creation of effective methods of the chemical analysis and investigations of structure of substances and materials».

 

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Related papers

Presentation: Poster at E-MRS Fall Meeting 2008, Symposium F, by Gleb Yurkov
See On-line Journal of E-MRS Fall Meeting 2008

Submitted: 2008-05-13 15:40
Revised:   2009-06-07 00:48